As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ELECTRICAL ARCING ACCOMPANIED BY ACRID SMELL FROM BASE OF CA'S FORWARD WINDOW. WINDOW HEAT CB PULLED AND ARCING CEASED. EMERGENCY DECLARED. VISUALLY INSPECTED CAPT'S FWD WINDOW BASE FOR ANY SIGNS OF ARCING. CKS OK, RESISTANCE CHECK OF CAPT'S FWD WINDOW HEAT SENSORS GOOD IAW AWM 30-42-01. REPLACED WINDOW HEAT COMPUTER 1 IAW AMM 30-42-34-000, 30-42-00-710-001.